Blue Cohosh (Caulophyllum thalictroides), is a choice woodland wildflower treasured for its lacy blue-green foliage and deep blue berries. This beautiful woodland plant prefers a rich soil with consistent moisture, such as found in low woodlands. The early spring flowers clusters are a yellowish green. The flowers ripen into berries that eventually turn deep blue. The compound leaves turn bright green-gold later in the season. Looks great when planted with lower growing wildflowers, ferns, and sedges. The berries of Blue Cohosh are slighty toxic for humans, and should not be eaten.